the nylon and nylon/lycra yarns were coated with electrically conductive polymers such as polyaniline and polypyrrole, via chemical polymerization process. electrical conductivity of the coated yarns was measured at variousstrain levels using two-point probe technique and their strain sensitivities were studied. the results showed that, electrical conductivity of the coated yarns decreased with...

controlled by the organic content of the enamel. Marshall, Olson, and Lee4 in 1975 studied acid etching for pit and fissure sealants without precleaning the teeth and found significant advantage in having a clean, debris-free, and uniformly roughened surface for good sealing. They proposed longer etching time. Other studies proposed using other materials to solve this problem of debris. In 1979...

to study the mechanical and thermal parameters effective on quality and quantity of olive oil towards an extraction of highly pure oil, the velocity in rps of crushing rollers, at two levels of 6 and 12 (rps) along with the temperature of the mixing unit at three levels of 30, 45 and 60°c were taken into account. data, obtaind through a factorial experiment of randomized complete block design (...